// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stdint.h>

#include "base/at_exit.h"
#include "base/files/memory_mapped_file.h"
#include "base/path_service.h"
#include "media/base/test_data_util.h"
#include "media/filters/jpeg_parser.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace media {

TEST(JpegParserTest, Parsing)
{
    base::FilePath data_dir;
    ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &data_dir));

    // This sample frame is captured from Chromebook Pixel
    base::FilePath file_path = data_dir.AppendASCII("media")
                                   .AppendASCII("test")
                                   .AppendASCII("data")
                                   .AppendASCII("pixel-1280x720.jpg");

    base::MemoryMappedFile stream;
    ASSERT_TRUE(stream.Initialize(file_path))
        << "Couldn't open stream file: " << file_path.MaybeAsASCII();

    JpegParseResult result;
    ASSERT_TRUE(ParseJpegPicture(stream.data(), stream.length(), &result));

    // Verify selected fields

    // SOF fields
    EXPECT_EQ(1280, result.frame_header.visible_width);
    EXPECT_EQ(720, result.frame_header.visible_height);
    EXPECT_EQ(1280, result.frame_header.coded_width);
    EXPECT_EQ(720, result.frame_header.coded_height);
    EXPECT_EQ(3, result.frame_header.num_components);
    EXPECT_EQ(1, result.frame_header.components[0].id);
    EXPECT_EQ(2, result.frame_header.components[0].horizontal_sampling_factor);
    EXPECT_EQ(1, result.frame_header.components[0].vertical_sampling_factor);
    EXPECT_EQ(0, result.frame_header.components[0].quantization_table_selector);
    EXPECT_EQ(2, result.frame_header.components[1].id);
    EXPECT_EQ(1, result.frame_header.components[1].horizontal_sampling_factor);
    EXPECT_EQ(1, result.frame_header.components[1].vertical_sampling_factor);
    EXPECT_EQ(1, result.frame_header.components[1].quantization_table_selector);
    EXPECT_EQ(3, result.frame_header.components[2].id);
    EXPECT_EQ(1, result.frame_header.components[2].horizontal_sampling_factor);
    EXPECT_EQ(1, result.frame_header.components[2].vertical_sampling_factor);
    EXPECT_EQ(1, result.frame_header.components[2].quantization_table_selector);

    // DRI fields
    EXPECT_EQ(0, result.restart_interval);

    // DQT fields
    EXPECT_TRUE(result.q_table[0].valid);
    EXPECT_TRUE(result.q_table[1].valid);
    EXPECT_FALSE(result.q_table[2].valid);
    EXPECT_FALSE(result.q_table[3].valid);

    // DHT fields (no DHT marker)
    EXPECT_FALSE(result.dc_table[0].valid);
    EXPECT_FALSE(result.ac_table[0].valid);
    EXPECT_FALSE(result.dc_table[1].valid);
    EXPECT_FALSE(result.ac_table[1].valid);

    // SOS fields
    EXPECT_EQ(3, result.scan.num_components);
    EXPECT_EQ(1, result.scan.components[0].component_selector);
    EXPECT_EQ(0, result.scan.components[0].dc_selector);
    EXPECT_EQ(0, result.scan.components[0].ac_selector);
    EXPECT_EQ(2, result.scan.components[1].component_selector);
    EXPECT_EQ(1, result.scan.components[1].dc_selector);
    EXPECT_EQ(1, result.scan.components[1].ac_selector);
    EXPECT_EQ(3, result.scan.components[2].component_selector);
    EXPECT_EQ(1, result.scan.components[2].dc_selector);
    EXPECT_EQ(1, result.scan.components[2].ac_selector);
    EXPECT_EQ(121150u, result.data_size);
    EXPECT_EQ(121358u, result.image_size);
}

TEST(JpegParserTest, CodedSizeNotEqualVisibleSize)
{
    base::FilePath data_dir;
    ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &data_dir));

    base::FilePath file_path = data_dir.AppendASCII("media")
                                   .AppendASCII("test")
                                   .AppendASCII("data")
                                   .AppendASCII("blank-1x1.jpg");

    base::MemoryMappedFile stream;
    ASSERT_TRUE(stream.Initialize(file_path))
        << "Couldn't open stream file: " << file_path.MaybeAsASCII();

    JpegParseResult result;
    ASSERT_TRUE(ParseJpegPicture(stream.data(), stream.length(), &result));

    EXPECT_EQ(1, result.frame_header.visible_width);
    EXPECT_EQ(1, result.frame_header.visible_height);
    // The sampling factor of the given image is 2:2, so coded size is 16x16
    EXPECT_EQ(16, result.frame_header.coded_width);
    EXPECT_EQ(16, result.frame_header.coded_height);
    EXPECT_EQ(2, result.frame_header.components[0].horizontal_sampling_factor);
    EXPECT_EQ(2, result.frame_header.components[0].vertical_sampling_factor);
}

TEST(JpegParserTest, ParsingFail)
{
    const uint8_t data[] = { 0, 1, 2, 3 }; // not jpeg
    JpegParseResult result;
    ASSERT_FALSE(ParseJpegPicture(data, sizeof(data), &result));
}

} // namespace media
